Document Type
Article
Publication Date
9-1-1996
Abstract
The cross sections for the deep inelastic charged-current interactions e+p → ν̄X and e-p → νX have been measured in the kinematic region x > 0.006 and Q2 > 200GeV2, using the e+p and e-p data collected with the ZEUS detector during 1993 and 1994. For the integrated cross sections, σe+→ν̄X(Q2>200 GeV2) = 30.3- 4.2+ 5.5 [stat] -2.6+1.6 [syst] pb σe-p→νX(Q2>200 GeV2) = 54.7-9.8+15.9 [stat] -3.4+2.8 [syst] pb are obtained, in good agreement with the Standard Model expectations of 32.3pb and 65.8pb. The differential cross sections have been measured as functions of Q2, x and y. The differences between e+p and e-p scattering, which are expected from the V-A helicity structure of the weak interaction and from the quark content of the proton, are clearly observed. No significant deviation from the Standard Model predictions is found. The measured Q2 dependence of the differential cross sections for e+ and c- induced CC DIS reactions is used to determine the W mass. The measured value of MW is 79 -7 -4+8 +4 GeV, in good agreement with direct measurements performed at pp̄ colliders. A jet analysis has been performed and CC events with multiple jets have been observed. The distributions of the jet transverse momentum and rapidity as well as transverse energy flow jet profiles have been measured and are compared to the script O sign(αs) predictions of the ARIADNE and MEPS Monte Carlo models. Good agreement is observed in both the jet profiles and the jet rates. A search for charged-current events with a large rapidity gap between the observed hadronic system and the outgoing proton system yielded one candidate event in the e+p sample, corresponding to a cross section of σe+p→ν̄X(Q2 > 200 GeV2; ηmax < 2.5) = 0.8 -0.7+1.8 [stat] ±0.1 [syst] pb. © Springer-Verlag 1996.
Journal Title
Zeitschrift fur Physik C-Particles and Fields
Volume
72
Issue
1
First Page
47
Last Page
64
DOI
10.1007/BF02909131
First Department
Physics
Recommended Citation
Derrick, M.; Krakauer, D.; Magill, S.; Mikunas, D.; Musgrave, B.; Okrasinski, J. R.; Repond, J.; Stanek, R.; Talaga, R. L.; Zhang, H.; Mattingly, Margarita C. K.; Antonioli, P.; Bari, G.; Basile, M.; Bellagamba, L.; Boscherini, D.; Bruni, A.; Bruni, G.; Bruni, P.; Cara Romeo, G.; Castellini, G.; Cifarelli, L.; Cindolo, F.; Contin, A.; Corradi, M.; Gialas, I.; Giusti, P.; Iacobucci, G.; Laurenti, G.; Levi, G.; and Margotti, A., "Study of Charged-Current ep Interactions at Q2 ≫ 200 Gev2 with the ZEUS Detector at HERA" (1996). Faculty Publications. 2699.
https://digitalcommons.andrews.edu/pubs/2699
Acknowledgements
Accepted version retrieved July 20, 2021 from https://www.andrews.edu/sed/gpc/faculty-research/coffen-research/coffen_2009_600.pdf